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Verified: September 2026

Car Insurance Research: Physical Damage & Repair Funding

Can You Claim Car Repairs on Insurance?

Last Verified: September 2026Independent Research Report

The estimate is sitting on the counter and the number on it is larger than anything you budgeted for this month. Maybe the shop found a cracked radiator support behind a bumper that barely looked scuffed. Maybe the transmission started slipping on the highway and the diagnosis came back as an internal failure. Either way you are paying a premium every month to a company whose entire business is paying for damage to this car, and the obvious question is why that money should not be pointed at this invoice. So can you claim car repairs on insurance?

Sometimes. A personal auto policy pays for direct and accidental loss — a crash, theft, hail, fire, vandalism, an animal. It does not pay for wear and tear, freezing, or mechanical or electrical breakdown. The cause decides, not the cost. What separates a paid claim from a denied one is almost never the size of the repair.

That single line — accident on one side, deterioration on the other — runs through every part of the repair economy. It decides whether the adjuster writes a check or a denial letter. It is the reason two entirely separate financial products exist to cover the failures your auto policy refuses. It explains why a worn tire is excluded but the guardrail damage the blowout caused is not. And once a covered claim is open, a second layer of law takes over: who chooses the shop, who chooses the parts, and what you are owed after the car is fixed but worth less than it was.

Research Summary

Three Numbers Behind the Repair Decision

4
Causes excluded by one sentence of the policy form

The damage-to-your-auto part of the ISO Personal Auto Policy excludes loss due and confined to wear and tear, freezing, mechanical or electrical breakdown or failure, and road damage to tires.[1]

60 days
Before a service contract holder can bill the backing insurer directly

Under the NAIC Service Contracts Model Act, a contract insured by a reimbursement insurance policy must state that if the provider fails to pay or provide service within 60 days after proof of loss is filed, the holder may claim directly against the insurance company.[6]

10–20%
Diminished value as a share of the physical damage loss

A 2023 article in the NAIC’s Journal of Insurance Regulation reports that in practical claim settlement the diminished value loss ends up being roughly 10 to 20 percent of the direct physical damage loss.[14]

Two Words Decide Almost Every Repair Question

Many private passenger auto policies sold in the United States are built from the Insurance Services Office Personal Auto Policy form, though carrier forms vary and your declarations page governs your own contract. Its physical damage part — Part D, Coverage for Damage to Your Auto — opens with a sentence that settles most repair questions before anyone looks at an estimate: the insurer will pay for direct and accidental loss to a covered auto, minus any applicable deductible shown in the declarations.[1]

Direct means the loss is the damage to the car itself, not a downstream financial consequence of it. Accidental means something happened to the vehicle at an identifiable moment, rather than something happening inside it across four years and 60,000 miles. An insurance contract is a transfer of uncertain risk. A part that will certainly wear out is not an uncertain risk; it is a maintenance schedule.

From that opening grant the form splits into two optional coverages, and the split is made by the event, not by the appearance of the damage or the amount on the invoice. Collision is defined as the upset of the covered auto or its impact with another vehicle or object. The other coverage is the residual one: a direct and accidental loss that is not a collision is a loss other than collision. The form then names ten kinds of loss that are consideredother than collision — missiles or falling objects, fire, theft or larceny, explosion or earthquake, windstorm, hail, water or flood, malicious mischief or vandalism, riot or civil commotion, contact with bird or animal, and breakage of glass.[1] That list is a classification instruction, not a closed list of what is covered. It removes the argument for the ten most common events; it does not mean a direct and accidental non-collision loss is outside the coverage because it is not on the list. What ends coverage is an exclusion, not an absence from that list. The National Association of Insurance Commissioners describes the same division in consumer terms: collision coverage pays for damage from a collision with another car, an object, a pothole, or flipping over, while comprehensive coverage pays for damage not caused by a collision, such as theft, hail, windstorm, flood, fire, or impact by an animal.[2]

Each of those coverages is bought separately, each carries its own deductible, and a liability-only policy carries neither. The Texas Department of Insurance states the arithmetic plainly for consumers: a deductible must be paid for collision, comprehensive, and uninsured or underinsured motorist claims, and a deductible is the amount of a claim you pay yourself.[3] So a repair can be fully covered and still not be worth claiming — a $700 bumper against a $500 deductible produces a $200 check and a claim on your record.

Before you call anyone, find the words Collision and Other Than Collisionon your declarations page and read the dollar figure printed beside each. Those two numbers, not the policy’s coverage language, are what usually determine whether filing changes anything. Our research on when an insurer may legally deny a claim covers what has to happen after you do file.

The Exclusion That Sends Most Repair Bills Back to You

Consider how a healthy component reaches the end of its life. A clutch friction disc gives up a few microns of material at every engagement. A wheel bearing loses grease film over tens of millions of revolutions and its races begin to spall. A transmission clutch pack glazes as fluid oxidizes. Nothing external happens at any point in that sequence; the machine consumes itself in the ordinary course of being driven, and the day it stops working is the last day of a process that started when the car was new.

The policy draws the line there in a single sentence. Part D excludes loss due and confined to wear and tear, freezing, mechanical or electrical breakdown or failure, and road damage to tires.[1] Four categories, named explicitly, and between them they cover most of what a repair shop actually does in a week: brakes, clutches, bearings, alternators, water pumps, transmissions, and the tires themselves.

Read the phrase due and confined tocarefully, because it is doing narrower work than the phrase “not covered if the part was worn” would do. It excludes the deterioration and the failure. It does not convert everything the failure touches into an excluded loss, and it does not turn an accidental impact into an excluded one merely because the struck component was already aged. The exclusion is aimed at a cause, not at a car.

That distinction is the whole reason the same physical damage can produce two different answers. The table below runs eight ordinary repair situations through the form’s own definitions.

Policy classification

Which Repairs a Standard Auto Policy Pays For

Eight common vehicle repair situations classified under the ISO Personal Auto Policy form, showing which coverage responds, if any, and the policy language that produces the result.
Repair SituationWhat RespondsWhy, Under the Form
The transmission slips, then stops engaging, at 141,000 miles. No crash was involved.Not coveredThe damage-to-your-auto part excludes damage due and confined to mechanical or electrical breakdown or failure. Nothing struck the car, so no coverage grant is reached in the first place.[1]
You rear-end the car ahead of you and fold the radiator support.CollisionThe form defines collision as the upset of the covered auto or its impact with another vehicle or object, and pays for that loss regardless of who was at fault, minus the collision deductible.[1]
A hailstorm dimples the roof, hood, and deck lid.Other than collisionHail is one of the perils the form lists as loss other than collision, alongside fire, theft or larceny, windstorm, flood, vandalism, and contact with a bird or animal.[1]
The engine seizes after 30,000 miles without an oil change.Not coveredNothing struck the car, so the loss is not the direct and accidental loss the insuring agreement pays for, and the damage is due and confined to mechanical breakdown — the exact wording of Exclusion 2.c.[1]
A worn tire blows out at highway speed and the car slides into a guardrail.Split: tire excluded, crash damage coveredThe exclusion reaches damage due and confined to wear and tear and road damage to tires — which is the tire itself. The bent suspension and crushed quarter panel are a separate, direct, accidental loss.[1]
You strike a steel bracket lying in the travel lane, it punctures the oil pan, and the engine seizes a mile later.CollisionThe initiating event is impact with an object, which is the form’s own definition of collision. The exclusion reaches damage "due and confined to" breakdown, and this damage is due to the bracket, so the words do not reach it.[1]
An overnight freeze cracks the engine block because the coolant mix was too weak.Not coveredFreezing is named in the same exclusion sentence as wear and tear and mechanical or electrical breakdown. It is excluded by name, not by argument.[1]
A thief cuts the catalytic converter out of the exhaust in a parking lot.Other than collisionTheft or larceny is a listed other-than-collision peril. The repair is a covered loss even though the part that has to be replaced is a mechanical component.[1]
Compiled from the insuring agreement, the definition of “collision,” and Exclusion 2 of the ISO Personal Auto Policy PP 00 01 06 98 specimen form. Carrier forms are not uniform, state endorsements can move a loss between coverages, and every claim turns on its own facts — read your own declarations page and definitions.Verified: September 2026

Our companion report on whether car insurance covers wear and tear works through the same exclusion in detail, and the alternator analysis follows a single component from failure through denial.

When the Breakdown Causes the Crash, and When the Crash Causes the Breakdown

Most disputed repair claims are not arguments about whether a part is worn. They are arguments about direction — which event set the chain in motion. An accident that produces a mechanical failure and a mechanical failure that produces an accident look nearly identical in the shop and are treated very differently on the claim file.

Start with the direction that favors the policyholder. You strike a steel bracket lying in the travel lane. The bracket punches through the oil pan, the pan empties in under a mile, the bearings starve, and the engine seizes. The engine is destroyed by a mechanical failure — but the mechanical failure was set in motion by an impact with an object, which is precisely what the form defines as collision.[1] The failure is not due and confined to breakdown; it is due to the bracket.

The four words carry that result on their own. Due points at the cause, and confined tolimits the exclusion to damage that goes no further than the excluded cause. A seized engine whose oil left through a hole punched by a bracket is due to the bracket, and the damage is not confined to a breakdown; the breakdown is a step in the chain, not the origin of it. Compare the wording of the very next exclusion in the same form, Exclusion 3, which reaches loss “due to or as a consequence of” its listed causes. The breakdown exclusion was not drafted that way, and the difference between those two phrases is the whole argument.[1]

A frequently cited outside decision points the same direction, and it is worth being precise about how little it decides here. Caldwell v. Transportation Insurance Co.is a 1988 Supreme Court of Virginia decision about an all-risks policy on well-drilling equipment, not about a personal auto policy. The drill bar bent and broke after striking a change in the rock strata, and the insurer denied under an exclusion for loss “caused by” structural or mechanical or electrical breakdown or failure. The court read that exclusion to reach only losses arising from an internal or inherent deficiency or defect rather than from an external cause, and held it did not bar the claim.[5] Different policy, different property, different exclusion wording — a personal auto claim is decided by the words quoted above, not by Caldwell. It is useful only as an illustration that courts read breakdown exclusions against the cause chain, which is the same question an adjuster is asking when the adjuster asks what happened first.

Now run the chain the other way. A tie rod end that has been clunking for a year finally separates, the wheel toes out violently, and the car leaves the road into a barrier. The tie rod is gone under the breakdown exclusion — it failed from the inside and no external event started it. The crushed bumper, fender, and headlamp are a different matter entirely: they are direct and accidental damage from impact with an object, which the coverage grant reaches on its own terms.[1] The narrow words due and confined to are what keeps the excluded part from dragging the rest of the car out of coverage with it.

The Question Behind the Question

An adjuster reviewing a repair claim is not asking “is this part worn?” They are asking “what is the first event in this chain, and did it come from outside the vehicle?” Write your loss description as a sequence, in order, with the external event first if there was one.

This is also why documentation matters more than argument. A tow receipt, a dash camera clip, a photograph of the debris in the road, or a shop’s written teardown finding that a punctured pan preceded the bearing damage are what fix the direction of the chain on the record. Once the file says the part simply failed, reversing that characterization is an uphill fight. Pothole claims turn on the same sequencing; our research on claiming pothole damage walks through how those files are built, and the analysis of a single-vehicle impact with a fixed object covers the at-fault collision version.

What Actually Pays for a Mechanical Repair

Because the standard policy carves mechanical failure out by name, a separate market exists to sell it back. Two products occupy that space, they are routinely sold under the same showroom phrase — “extended warranty” — and they are legally different instruments. The NAIC Service Contracts Model Act, the template most state service contract statutes are cut from, defines both in the same section.

Mechanical breakdown insurance is defined there as a policy, contract, or agreement issued by an authorized insurer that provides for the repair, replacement, or maintenance of property, or indemnification for it, for the operational or structural failure of the property due to a defect in materials or workmanship or to normal wear and tear.[6] Read the two halves of that definition against the auto policy exclusion and the market logic becomes visible: the causes that put a product in this regulatory category — defect and normal wear and tear — are the causes Part D refuses. That is a definition of the category, not a promise in anyone’s contract. What a specific policy or contract actually pays for is fixed by its own covered-components schedule and its own exclusions, and those vary from one product to the next.

A service contractis defined as a contract or agreement, for separately stated consideration or for a specific duration, to perform the repair, replacement, or maintenance of property, or indemnification for it, for operational or structural failure due to a defect in materials, workmanship, or normal wear and tear — with or without incidental payment of indemnity for towing, rental, and emergency road service. The definition then draws the boundary itself: it does not include mechanical breakdown insurance or maintenance agreements.[6] Same failures, same repairs, different legal instrument. The model act’s own drafting note states that it assumes service contracts are exempt from the insurance code.[6]

A third instrument sits beside both. The model act defines a warranty as one made solely by the manufacturer, importer, or seller without charge, not negotiated or separated from the sale of the product and incidental to it.[6] The Federal Trade Commission draws the same line for consumers: a warranty comes with the vehicle and is a promise to fix certain defects or malfunctions during a specific timeframe, while service contracts are optional agreements sold separately by manufacturers, dealers, or independent companies.[8] And here the model definition and the marketplace part company, which is the single most expensive misunderstanding in this section. The model act says a service contract is one that covers failure due to defect, workmanship, or normal wear and tear; the FTC says that in practice auto service contracts typically do not cover damage that occurs in an accident, or normal wear and tear to the vehicle.[8] Both are true because they describe different things. The model definition draws the outer boundary of a regulated category; the contract in front of you draws its own, usually much smaller, through a covered-components schedule and an exclusions page. Do not buy a service contract on the strength of the category definition. Read the list of covered components and the list of exclusions, and check specifically whether a part that fails from normal wear is listed as covered or listed as excluded — that one line decides most claims under these contracts.

The practical consequence of the insurance-versus-contract distinction is who is standing behind the promise when a $6,000 transmission claim lands. Mechanical breakdown insurance is issued by an insurer the state has authorized, with the solvency supervision that carries. A service contract provider is not an insurer, so the model act builds a substitute: it requires each provider contractually obligated to perform to back its obligations one of three ways, and it requires the contract itself to tell the buyer which one was chosen.

Model law requirements

What a Vehicle Service Contract Must Contain

Core obligations the NAIC Service Contracts Model Act places on service contract providers, covering financial security, required disclosures, deductibles, aftermarket parts, the return window, naming restrictions, and prohibited bundling.
RequirementWhat the Model Act Requires
Financial security behind the promiseEach provider contractually obligated to perform must either insure all its service contracts under a reimbursement insurance policy issued by an authorized insurer; maintain a funded reserve of not less than 40 percent of gross consideration received less claims paid, plus a security deposit with the commissioner of not less than 5 percent of that figure and not less than $25,000; or maintain a net worth of $100 million.
What an insured contract has to sayA contract backed by a reimbursement insurance policy must state that if the provider fails to pay or provide service on a claim within 60 days after proof of loss has been filed, the contract holder is entitled to make a claim directly against the insurance company, and must name that insurer.
What an uninsured contract has to sayA contract not backed by a reimbursement insurance policy must state that the provider’s obligations are backed only by the full faith and credit of the provider and are not guaranteed under a service contract reimbursement insurance policy.
Deductibles and exclusionsThe contract must conspicuously state the existence of any deductible amount, specify the merchandise and services provided and any limitations, exceptions, or exclusions, and clearly state whether it provides for or excludes consequential damages or preexisting conditions.
Aftermarket partsThe contract must state the conditions upon which the use of non-original manufacturers’ parts, or substitute service, may be allowed, and those conditions must comply with applicable state and federal laws.
Return windowProviders must permit the holder to return the contract within at least 20 days of the date it was mailed, or at least 10 days if it was delivered at the time of sale. With no claim made, the contract is void and the full purchase price is refunded; a refund not paid within 30 days of return carries a 10 percent per month penalty.
Naming restrictionsA provider may not use the words insurance, casualty, guaranty, surety, or mutual in its name, and a company grandfathered into such a name must conspicuously disclose in its contracts a statement substantially to the effect that the agreement is not an insurance contract.
No bundling with financingA bank, savings and loan association, lending institution, manufacturer, or seller may not require the purchase of a service contract as a condition of a loan or as a condition for the sale of any property.
Summarized from the NAIC Service Contracts Model Act (MO-685).[6] This is a model law, adopted by states in varying forms and with state-specific thresholds; it is not itself binding anywhere. Confirm the version your state enacted with your state insurance department.Verified: September 2026

Those requirements translate into four questions worth asking before signing anything at a finance desk. Is this contract insured, and by whom? If it is, the contract must name the insurer and disclose the 60-day direct-claim right. If it is not, the contract must say so in the full-faith-and-credit language, which tells you that the provider’s balance sheet is the only thing behind your transmission.[6] What is the deductible, and is it per visit or per repair? What does the contract say about non-original manufacturers’ parts? And how long is the return window — at least 20 days from mailing, or at least 10 days if it was handed to you at the sale.[6]

One prohibition is worth memorizing separately, because it is the one most often tested in a finance office: a bank, savings and loan association, lending institution, manufacturer, or seller may not require the purchase of a service contract as a condition of a loan or as a condition for the sale of any property.[6] A service contract is a separate purchase decision, not a term of the financing.

Your Factory Warranty Does Not Die at an Independent Shop

There is a persistent showroom claim that having maintenance or repairs done anywhere other than the dealership will void the factory warranty, and it collides directly with a federal statute. The Magnuson-Moss Warranty Act provides, at 15 U.S.C. § 2302(c), that no warrantor of a consumer product may condition its written or implied warranty on the consumer using, in connection with the product, any article or service identified by brand, trade, or corporate name — other than an article or service provided without charge under the terms of the warranty.[7] The statute permits an exception only where the Federal Trade Commission grants a waiver after finding the requirement necessary for the product to function properly and the waiver in the public interest.[7]

The FTC applies that provision to vehicles in plain language for consumers: you do not have to use the dealer for repairs or maintenance to keep your warranty in effect.[8] Its business guidance frames the same rule from the warrantor’s side — unless the warrantor provides the parts or services free of charge or obtains an FTC waiver, statements requiring the use of specified parts or services are generally prohibited by the Act.[9] The logical corollary also holds: where warranty work is genuinely free, the warrantor may direct where it is performed and which parts are used.[8]

The rule has a real limit and it is worth stating precisely. A warrantor is not barred from denying coverage for damage a third party or an outside part actually caused; the FTC’s business guidance contemplates language disclaiming coverage for defects or damage caused by parts or service the warrantor did not provide.[9] What the Act forbids is the blanket condition — the rule that says coverage ends because you went elsewhere, without any showing that going elsewhere caused anything.

The two products are governed by opposite default rules on this point, and mixing them up costs people money. On the factory warranty side, the FTC states that it is illegal for a dealer to deny warranty coverage because you had routine maintenance or repairs done by someone else, and that the manufacturer or dealer must prove an aftermarket or recycled part caused the damage before denying coverage. The burden sits on the warrantor, and it is a burden of causation.[8] On the service contractside the default flips: the FTC warns that the contract might require you to follow all the manufacturer’s recommendations for routine maintenance, such as oil changes, and that if you do not, it might void the contract and end coverage.[8] So look at which document you are relying on and find its maintenance clause.

Either way the practical defense is documentary, not legal: keep dated, itemized receipts for every service, showing the mileage and the fluid or part specification used. Under a warranty, those receipts are what defeats an unsupported claim that outside service caused the failure. Under a service contract, they are what satisfies the maintenance condition the contract imposes on you. The receipt is what converts “I had it done” into evidence.

Who Picks the Shop, and Who Picks the Parts

Once a covered claim is open, a second body of law takes over, and it exists because the insurer and the policyholder want different things from the same repair. The insurer is managing claim severity across a portfolio. The owner is managing one car they intend to keep driving. Referral networks sit on that fault line: a network shop agrees to discounted rates and streamlined approvals in exchange for a steady volume of referrals, which is efficient right up to the point where the referral becomes a requirement.

Several states legislated on it. California Insurance Code § 758.5 provides that no insurer shall require that an automobile be repaired at a specific automotive repair dealer, permits a suggestion or recommendation only where the claimant expressly requests a referral or has been informed in writing of the right to select the repair facility, and bars the insurer from suggesting a different dealer once the claimant has chosen one.[10] Where the insurer recommended the shop, the section also addresses the cost side, barring the insurer from limiting or discounting reasonable repair costs by reference to what its own preferred facility would have charged.[10]

New York goes further upstream. Insurance Law § 2610 provides that no insurer providing collision or comprehensive coverage shall require that repairs be made in a particular place or shop or by a particular concern, and — in processing the claim, other than a claim solely involving window glass — that the insurer shall not recommend or suggest a particular place, shop, or concern unless expressly requested by the insured.[11] The unsolicited suggestion itself is what the statute reaches.

Texas attaches the same principle to the parts, in two subsections that do different work. Insurance Code § 1952.301(a) provides that, except as provided by rules adopted by the commissioner, under an automobile insurance policy delivered, issued for delivery, or renewed in Texas, an insurer may not directly or indirectly limit the insurer’s coverage under a policy covering damage to a motor vehicle by specifying the brand, type, kind, age, vendor, supplier, or condition of parts or products that may be used to repair the vehicle, or by limiting the beneficiary of the policy from selecting a repair person or facility to repair damage to the vehicle. The opening clause matters: this is a rule the Texas commissioner of insurance can qualify by rule, so check the current Texas Administrative Code alongside the statute.[12]

Subsection (b) is narrower and is written for a different claimant. In settling a liability claim by a third party against an insured for property damage claimed by the third party, an insurer may not require the third-party claimant to have repairs made by a particular repair person or facility or to use a particular brand, type, kind, age, vendor, supplier, or condition of parts or products. It is a prohibition on requiring, not on limiting coverage, and it carries no commissioner-rule exception. If you are the other driver claiming against someone else’s insurer in Texas, subsection (b) is your provision; if you are the policyholder, subsection (a) is.[12]

State statutes

Three States That Legislated Repair-Shop Choice

Anti-steering provisions in the California, New York, and Texas insurance codes governing whether an insurer may require or recommend a particular repair facility or dictate replacement parts.
StateStatuteCore Provision
CaliforniaCal. Ins. Code § 758.5No insurer shall require that an automobile be repaired at a specific automotive repair dealer. An insurer may suggest or recommend one only if the claimant expressly requests a referral or has been informed in writing of the right to select the repair facility. After the claimant has chosen a repair dealer, the insurer shall not suggest or recommend a different one.[10]
New YorkN.Y. Ins. Law § 2610No insurer providing collision or comprehensive coverage shall require that repairs be made in a particular place or shop or by a particular concern; and in processing the claim, other than a claim solely involving window glass, the insurer shall not recommend or suggest a particular place, shop, or concern unless expressly requested by the insured.[11]
TexasTex. Ins. Code § 1952.301Subsection (a): except as provided by rules adopted by the commissioner, under an automobile insurance policy delivered, issued for delivery, or renewed in Texas, an insurer may not directly or indirectly limit the insurer’s coverage under a policy covering damage to a motor vehicle by (1) specifying the brand, type, kind, age, vendor, supplier, or condition of parts or products that may be used to repair the vehicle, or (2) limiting the beneficiary of the policy from selecting a repair person or facility. Subsection (b) is a separate and narrower third-party rule: in settling a liability claim by a third party against an insured for property damage, an insurer may not require the third-party claimant to have repairs made by a particular repair person or facility or to use a particular brand, type, kind, age, vendor, supplier, or condition of parts or products. Subsection (b) carries no "directly or indirectly limit coverage" language and no commissioner-rule exception.[12]
Three states only, quoted from the current statutory text. This is not a 50-state survey; other states regulate repair-facility referrals through different statutes, insurance department regulations, or unfair claim settlement practices rules. Confirm the rule in your own state with its insurance department.Verified: September 2026

Regulator consumer guidance says the same thing in the register a policyholder actually needs at the counter. The Texas Department of Insurance tells drivers that some companies might give a list of preferred repair shops, but they cannot require you to use a shop on that list.[3]

The parts question runs in the opposite direction, and it is where policyholders are most often surprised. Choosing the shop does not mean choosing the parts. The same Texas guidance states that the insurance company is only required to pay for parts of like kind and quality to those that were damaged, and does not have to pay for original parts from the manufacturer.[3] The policy’s own limit of liability provision is built the same way: the insurer owes the lesser of the actual cash value of the damaged property or the amount necessary to repair or replace it with other property of like kind and quality.[1] If you want factory parts specifically, that is either a negotiation, an endorsement you buy in advance, or a difference you pay yourself.

The Losses That Outlive the Repair

Two financial losses survive a technically perfect repair, and both are routinely left on the table because nobody asks for them.

The first is the deductible, when someone else caused the damage. Your insurer that pays your claim can pursue the at-fault party, and the NAIC’s model claims-settlement regulation directs that insurers shall, upon the claimant’s request, include the first-party claimant’s deductible in subrogation demands; that recoveries be shared on a proportionate basis with the claimant unless the deductible has otherwise been recovered; and that no deduction for expenses be made from the deductible recovery unless an outside attorney is retained to collect it.[13] It is a model regulation adopted in varying forms by the states rather than a rule that binds everywhere, but it is the template most state claim-handling regulations are cut from. Ask, in writing, for your deductible to be included in the demand.

The second is diminished value — the gap between what the car was worth before the loss and what it is worth after a documented repair, even one executed flawlessly. Whether anyone owes it depends heavily on which side of the claim you are on. A 2023 article in the NAIC’s Journal of Insurance Regulation reported that Georgia was then the only state with a clear legal direction that first-party auto claimants may recover diminished value from their own insurer, following the Georgia Supreme Court’s 2001 decision in State Farm Mutual Automobile Insurance Co. v. Mabry, and that courts in Texas, Florida, and California had read the limit of liability provision as owing only repair cost or actual cash value.[14] That article itself describes first-party diminished value as an area of continuing state-by-state variation, and it is a 2023 snapshot rather than a current survey, so treat it as the position as of that publication and confirm your own state’s law before relying on it.

Third-party claims are a friendlier body of law. Where another driver caused the damage, the claim sounds in tort rather than contract, and the 2023 NAIC article reports that many states allow recovery of diminished value in a third-party claim, with settled losses running roughly 10 to 20 percent of the direct physical damage loss — so a $10,000 repair would likely support a claim between $1,000 and $2,000.[14] The 2023 article also describes the assessment itself as subjective, notes that formulas and private appraisers produce different figures, and observes that the loss is generally not realized until the vehicle is sold or traded.[14]

There is also a ceiling on the whole exercise. The policy’s limit of liability provision caps the insurer at the lesser of actual cash value or the cost to repair or replace with property of like kind and quality, which is the arithmetic that turns a repairable car into a total loss when the estimate climbs high enough against the car’s value.[1] Our research covers that boundary from both sides: whether an insurer can force a total loss and how adjusters determine a car’s value.

The Order of Operations

  1. Write the sequence, not the symptom.Describe what happened in order, with any external event first — the debris, the pothole, the other vehicle, the animal, the storm. The coverage grant reaches direct and accidental loss, so the external event is the part of the story the policy is built to respond to.[1]
  2. Test the loss against the exclusion, not against the price. If the damage is due and confined to wear and tear, freezing, mechanical or electrical breakdown or failure, or road damage to tires, no coverage grant reaches it regardless of how large the bill is.[1]
  3. Separate the excluded part from the damage it caused. A failed component and the collision damage that followed it are two different losses. Ask the shop to itemize them separately on the estimate.[1]
  4. Check the declarations page before you call. Collision and other-than-collision are separate optional coverages with separate deductibles, and a deductible is the amount of the claim you pay yourself.[3]
  5. For a mechanical failure, read the right document.Mechanical breakdown insurance and service contracts are the two product categories written for defect and wear-and-tear failures the auto policy excludes — but the NAIC definition describes the category, not your contract, and the FTC warns that auto service contracts typically do not cover normal wear and tear. Read the covered- components schedule and the exclusions page, then confirm whether the contract is insured, what the deductible is, and what it says about non-original manufacturers’ parts.[6] [8]
  6. Do not accept “it has to be the dealer.” No warrantor may condition a warranty on using a brand-name article or service unless it is provided free of charge or the Federal Trade Commission waives the rule, and the FTC tells consumers directly that dealer service is not required to keep a warranty in effect and that the manufacturer or dealer must prove an aftermarket or recycled part caused the damage before denying warranty coverage.[7] [8]
  7. Pick your own shop where your state protects that choice.California, New York, and Texas each bar an insurer from requiring a particular repair facility. Texas Insurance Code § 1952.301(a) also bars the insurer, except as provided by rules adopted by the commissioner, from limiting coverage by specifying the brand, type, kind, age, vendor, supplier, or condition of parts; its subsection (b) is a separate, narrower rule barring an insurer from requiring a third-party claimant to use a particular repair facility or particular parts.[10] [11] [12]
  8. Ask for the deductible in the subrogation demand.Where another party caused the loss, the NAIC model claims-settlement regulation directs insurers to include the first-party claimant’s deductible in the demand on request and to share recoveries proportionately.[13]
  9. Keep the whole file.Estimates, supplements, photographs, the repair invoice, and the parts list are what support a later diminished value claim against an at-fault driver — and what document your maintenance history if a warranty claim is ever questioned.[14]

Frequently Asked Questions

Will my auto policy pay to replace a failed transmission?

Not when the transmission failed on its own. The damage-to-your-auto part of the ISO Personal Auto Policy excludes damage due and confined to mechanical or electrical breakdown or failure. The product categories built for that repair are mechanical breakdown insurance, defined in the NAIC Service Contracts Model Act as a policy issued by an authorized insurer covering operational or structural failure due to a defect in materials or workmanship or to normal wear and tear, and a vehicle service contract, a non-insurance agreement covering the same kind of failure. Those are category definitions. Whether the specific contract you hold pays for a transmission is decided by its covered-components schedule and its exclusions — the FTC warns that auto service contracts typically do not cover normal wear and tear.

What if something outside the car destroyed a mechanical part?

That is a different claim. If an impact with an object starts the chain — a bracket in the road punctures the oil pan and the engine seizes — the initiating event is the collision the form defines, not an internal breakdown. The exclusion is written for damage "due and confined to" mechanical or electrical breakdown, and damage caused by the bracket is neither due to nor confined to a breakdown. Note the contrast with the next exclusion in the same form, which reaches loss "due to or as a consequence of" its listed causes; the breakdown exclusion was not drafted with that reach. Document the external event.

My tire blew out and I hit a guardrail. What is covered?

Generally the crash damage, not the tire. The exclusion is written for damage due and confined to wear and tear and road damage to tires, which reaches the worn tire itself. The bent suspension and damaged bodywork are a separate direct and accidental loss and are paid, if at all, under collision coverage subject to that deductible.

Does car insurance cover routine maintenance like brakes or an oil change?

No. Maintenance is the definition of an expected cost, and insurance transfers uncertain risk. Part D excludes damage due and confined to wear and tear, which is exactly what a brake pad, a clutch, a belt, or a fluid service represents. A maintenance agreement — defined in the NAIC Service Contracts Model Act as a contract of limited duration providing for scheduled maintenance only — is the separate product for that.

Is an extended warranty the same as mechanical breakdown insurance?

No, though they are sold under the same phrase. The NAIC Service Contracts Model Act defines mechanical breakdown insurance as a policy issued by an authorized insurer, and defines a service contract as a separately-paid agreement for the same kind of repair that expressly does not include mechanical breakdown insurance. The model act assumes service contracts are exempt from the insurance code, which is why it imposes its own financial-security regime: a reimbursement insurance policy, a funded reserve of at least 40 percent of gross consideration less claims paid plus a security deposit, or a $100 million net worth.

How do I know whether a service contract will actually be honored?

Read the disclosure the model act requires. An insured contract must state that if the provider fails to pay or provide service on a claim within 60 days after proof of loss has been filed, the holder is entitled to claim directly against the insurance company, and must name that insurer. An uninsured contract must state that the provider’s obligations are backed only by its full faith and credit. If neither statement appears, that itself is information.

Can a dealer void my warranty because I used an independent mechanic?

No. Under 15 U.S.C. § 2302(c) no warrantor may condition a written or implied warranty on the consumer using an article or service identified by brand, trade, or corporate name, unless it is provided without charge under the warranty or the Federal Trade Commission grants a waiver. The FTC states plainly that you do not have to use the dealer for repairs or maintenance to keep your warranty in effect, that it is illegal for a dealer to deny warranty coverage because routine maintenance or repairs were done by someone else, and that the manufacturer or dealer must prove an aftermarket or recycled part caused the damage before denying coverage. The burden is on the warrantor. Do not confuse that with an auto service contract, which the FTC says might require you to follow all the manufacturer’s recommendations for routine maintenance and might be voided if you do not — so keep dated, itemized receipts either way.

Can my insurer require me to use its body shop?

Not in California, New York, or Texas. California Insurance Code § 758.5 provides that no insurer shall require that an automobile be repaired at a specific automotive repair dealer. New York Insurance Law § 2610 bars requiring repairs in a particular place or shop and bars unsolicited recommendations other than for claims solely involving window glass. Texas Insurance Code § 1952.301(a) provides that, except as provided by rules adopted by the commissioner, an insurer may not directly or indirectly limit its coverage by limiting the beneficiary of the policy from selecting a repair person or facility; § 1952.301(b) separately bars an insurer from requiring a third-party claimant to use a particular repair person or facility. The Texas Department of Insurance tells consumers that a company may give a list of preferred shops but cannot require you to use one.

Do I have to accept aftermarket parts?

It depends on your state and your policy. The Texas Department of Insurance states that the insurance company is only required to pay for parts of like kind and quality to those that were damaged and does not have to pay for original manufacturer parts, and the ISO limit of liability provision is written the same way. At the same time, Texas Insurance Code § 1952.301(a) bars an insurer, except as provided by rules adopted by the commissioner, from directly or indirectly limiting its coverage by specifying the brand, type, kind, age, vendor, supplier, or condition of parts. The practical result is that the insurer owes a like-kind-and-quality amount, and the difference for factory parts is negotiated, endorsed in advance, or paid by you.

Someone else caused the damage. Do I get my deductible back?

Possibly, through subrogation. The NAIC Unfair Property/Casualty Claims Settlement Practices Model Regulation directs that insurers include the first-party claimant’s deductible in subrogation demands upon request, share recoveries proportionately unless the deductible has otherwise been recovered, and make no deduction for expenses from the deductible recovery unless an outside attorney is retained to collect it. States adopt the model in varying forms, so make the request in writing.

Should I file a claim for a repair just above my deductible?

Run the subtraction first. The deductible comes out before the insurer pays anything, so an $800 repair against a $500 deductible is a $300 payment. The Texas Department of Insurance advises finding out your deductible and getting repair estimates before filing, and notes that home and auto premiums can go up for filing most types of claims and that claim-free discounts can be lost. Ask your own carrier, in your own state, how a paid claim of that size is treated at renewal.


Scope & Limitations

This report covers personal auto insurance and vehicle repair funding in the 50 U.S. states and the District of Columbia. Policy language is quoted from the ISO Personal Auto Policy specimen form, which is the template many carrier forms are built from but is not itself your contract; individual filed forms, endorsements, and state amendments differ. Service contract requirements are quoted from an NAIC model act that states adopt in varying forms, with state-specific thresholds. Anti-steering provisions are quoted for three states and are not a 50-state survey. Claim-handling and parts guidance is cited from a single state regulator and from NAIC model laws. Caldwellis cited only as an illustration: it is a 1988 Virginia decision construing an all-risks policy on well-drilling equipment with different exclusion wording, not a personal auto case, and nothing on this page rests on it. The diminished value findings come from a 2023 journal article and are current as of that publication, not as of this page’s verification date. Repair cost figures used in examples are illustrative scenarios, not survey data.

Legal Disclaimer

This content is provided for informational and educational research purposes only. It does not constitute legal advice, insurance advice, or a coverage determination, and it does not create an attorney-client relationship. Statutes, regulations, model laws, case law, and carrier forms change; verify current requirements with your state insurance department, your own insurer, and the text of your own policy before taking any action.

Primary Source Directory

  1. Personal Auto Policy PP 00 01 06 98 (Specimen policy form): Insurance Services Office, Inc., hosted by the Nevada Division of Insurance. Part D provides that the insurer will pay for direct and accidental loss to a covered auto minus any applicable deductible; defines collision as the upset of the covered auto or its impact with another vehicle or object; lists the other-than-collision perils; excludes damage due and confined to wear and tear, freezing, mechanical or electrical breakdown or failure, and road damage to tires; and sets the limit of liability at the lesser of actual cash value or the amount necessary to repair or replace with property of like kind and quality.
  2. What Does Auto Insurance Cover? (Official regulator association guidance): National Association of Insurance Commissioners. States that collision coverage pays for damage to your car from a collision with another car, an object, a pothole, or flipping over, and that comprehensive coverage pays for damage not caused by a collision, such as theft, hail, windstorm, flood, fire, or impact by an animal.
  3. Auto Insurance Guide (Official regulator consumer guidance): Texas Department of Insurance. States that collision coverage pays to repair or replace your car after an accident and comprehensive pays if your car is stolen or damaged by fire, flood, vandalism, or something other than a collision; that a deductible must be paid on collision, comprehensive, and uninsured or underinsured motorist claims and is the amount of a claim you pay yourself; that some companies might give you a list of preferred repair shops but cannot require you to use a shop on the list; and that the insurance company is only required to pay for parts of like kind and quality to those that were damaged and does not have to pay for original parts from the manufacturer.
  4. Will my premium go up if I file a claim? (Official regulator guidance): Texas Department of Insurance. States that home and auto premiums can go up for filing most types of claims and that claim-free discounts can be lost; that companies cannot charge more for claims the company did not pay, including claims denied because the policy does not cover the damage; and advises finding out the deductible and getting repair estimates before filing.
  5. Caldwell v. Transportation Insurance Co., 234 Va. 639 (1988) (State supreme court decision, unofficial reproduction): Supreme Court of Virginia, reproduced by Justia, which is a commercial republisher and not an official reporter. The case construed an all-risks policy on well-drilling equipment, not a personal auto policy, and the exclusion at issue was for loss “caused by” structural or mechanical or electrical breakdown or failure. The court read that exclusion to reach only losses arising from an internal or inherent deficiency or defect rather than from an external cause. Cited on this page only as an illustration of how courts approach a breakdown exclusion; it does not construe the ISO Personal Auto Policy or its “due and confined to” wording, and it is not authority for any personal auto claim.
  6. Service Contracts Model Act, MO-685 (Model law): National Association of Insurance Commissioners. Defines mechanical breakdown insurance as a policy, contract, or agreement issued by an authorized insurer covering operational or structural failure due to a defect in materials or workmanship or to normal wear and tear; defines a service contract as a separately-paid agreement covering the same kind of failure that does not include mechanical breakdown insurance or maintenance agreements; defines a maintenance agreement and a warranty; carries a drafting note stating the model assumes service contracts are exempt from the insurance code; requires each obligated provider to insure its contracts under a reimbursement insurance policy, maintain a funded reserve of not less than 40 percent of gross consideration received less claims paid plus a security deposit of not less than 5 percent and not less than $25,000, or maintain a $100 million net worth; requires the 60-day direct-claim disclosure for insured contracts and the full-faith-and-credit disclosure for uninsured contracts; requires disclosure of deductibles, exclusions, preexisting conditions, and the conditions for use of non-original manufacturers’ parts; sets a return window of at least 20 days from mailing or 10 days from delivery with a 10 percent per month penalty on late refunds; restricts provider names; and prohibits requiring the purchase of a service contract as a condition of a loan or sale. These are definitions of regulated product categories, not descriptions of what any particular contract covers. A model act adopted in varying forms by the states.
  7. 15 U.S.C. § 2302(c), Magnuson-Moss Warranty Act (Official federal statute): Office of the Law Revision Counsel, U.S. House of Representatives. Provides that no warrantor of a consumer product may condition his written or implied warranty of such product on the consumer’s using, in connection with such product, any article or service — other than an article or service provided without charge under the terms of the warranty — which is identified by brand, trade, or corporate name, subject to waiver by the Federal Trade Commission.
  8. Auto Warranties and Auto Service Contracts (Official federal agency consumer guidance): Federal Trade Commission, Consumer Advice. States that you do not have to use the dealer for repairs or maintenance to keep your warranty in effect; that a warranty comes with the vehicle as a promise to fix certain defects or malfunctions during a specific timeframe while service contracts are optional agreements sold separately by manufacturers, dealers, or independent companies; that it is illegal for a dealer to deny warranty coverage because routine maintenance or repairs were done by someone else, and that the manufacturer or dealer must prove an aftermarket or recycled part caused the damage before denying warranty coverage; that service contracts typically do not cover damage occurring in an accident or normal wear and tear; and that a service contract might require the owner to follow all the manufacturer’s recommendations for routine maintenance, such as oil changes, and that failing to do so might void the contract and end coverage.
  9. Businessperson’s Guide to Federal Warranty Law (Official federal agency business guidance): Federal Trade Commission. Explains that, unless warrantors provide the parts or services free of charge or receive a waiver from the Commission, tie-in sales provisions requiring the use of specified parts or services are generally prohibited by the Magnuson-Moss Warranty Act, while a warrantor may disclaim coverage for defects or damage caused by parts or service the warrantor did not provide.
  10. California Insurance Code § 758.5 (Official state statute): California Legislative Information, Office of Legislative Counsel. Provides that no insurer shall require that an automobile be repaired at a specific automotive repair dealer; permits a suggestion or recommendation only where the claimant expressly requests a referral or has been informed in writing of the right to select the repair facility; bars the insurer from suggesting a different dealer after the claimant has chosen one; and addresses limiting or discounting reasonable repair costs based on charges that would have been incurred at the insurer’s recommended dealer.
  11. New York Insurance Law § 2610 (Official state statute): New York State Senate, Laws of New York. Subsection (a) provides that whenever a motor vehicle collision or comprehensive loss has been suffered by an insured, no insurer providing that coverage shall require that repairs be made to the vehicle in a particular place or shop or by a particular concern. Subsection (b) provides that in processing any such claim, other than a claim solely involving window glass, the insurer shall not, unless expressly requested by the insured, recommend or suggest repairs be made in a particular place or shop or by a particular concern.
  12. Texas Insurance Code § 1952.301 (Official state statute): Texas Legislature, Texas Statutes. Provides that, except as provided by commissioner rule, an insurer may not directly or indirectly limit its coverage under a policy covering damage to a motor vehicle by specifying the brand, type, kind, age, vendor, supplier, or condition of parts or products that may be used to repair the vehicle, or by limiting the beneficiary of the policy from selecting a repair person or facility; and that in settling a third-party property damage claim, an insurer may not require the claimant to have repairs made by a particular repair person or facility or to use particular parts or products.
  13. Unfair Property/Casualty Claims Settlement Practices Model Regulation, MO-902-1 (Model regulation): National Association of Insurance Commissioners. Directs that insurers include the first-party claimant’s deductible in subrogation demands upon the claimant’s request, that subrogation recoveries be shared on a proportionate basis with the first-party claimant unless the deductible has otherwise been recovered, and that no deduction for expenses be made from the deductible recovery unless an outside attorney is retained to collect it. A model regulation adopted in varying forms by the states.
  14. Automobile Diminished Value Claims, Journal of Insurance Regulation, 2023 (Regulator association research article): Center for Insurance Policy and Research, National Association of Insurance Commissioners. Published in 2023 and current as of that date rather than as of this page’s verification date; the article itself describes first-party diminished value as an area of continuing state-court variation. Reports that Georgia is the only state with a clear legal direction that first-party auto claimants may recover diminished value from their own insurer following State Farm Mutual Automobile Insurance Co. v. Mabry (2001); summarizes contrary readings of the limit of liability provision in Texas, Florida, and California; describes the assessment as subjective and generally unrealized until the vehicle is sold or traded; and reports that settled diminished value losses tend to run about 10 to 20 percent of the direct physical damage loss.